ADS LNA Design

[Keefe]

Designing an LNA in ADS and using Agilent MGA-72543 s2p file inserted into SnP. Ran initial simulation and received the following error message:
" Warning detected by hpeesofsim during circuit set up. Unable to resolve variable(s) or functions(s) in expression ` Zopt1=zopt(Sopt,PortZ1)' Sopt "
I attached my schematic, the error message and part of the s2p file.. This is my first time using Zopt and I am using Zopt to achieve the minimum noise figure. Does anyone know how I may alleviate this issue?

 

[RealAEL]

To complete this sort of optimum impedance measurement for noise match you need to have the required noise data in the s2p file, which you do, but you also have to have noise simulation enabled in the schematic. Edit the S-parameter controller so that under the Noise Tab the "Calculate noise" option is enabled and then it should work without error.

 

[Keefe]

Thank you for your input. That is how I solved the issue.